codegen: Generate u128 / i128 when available. #1391
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This is very mechanical and boring, but needed.
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I implemented the whole thing, but there's an autogenerated test failure that fails because of rust-lang/rust#54341. So i128 / u128 doesn't have the right alignment on Rust :( |
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Still I think it's an improvement over what we have... So if I were to land this I'd disable the autogenerated tests for that test. r? @fitzgen |
To work-around some cases of rust-lang/rust#54341. Other cases where u128 and u64 are mixed in fields might not behave correctly, but the field offset assertions would catch them. Fixes rust-lang#1370
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Yeah, so I fixed it kind of, by always forcing repr(align) for such alignments. That makes all tests pass. |
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LGTM!
Would be valuable to have test coverage for the blob bits by making a test with a struct that contains a __int128 that is marked as opaque.
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The blob bits unfortunately aren't an improvement over what we have because of that rust alignment issue, so I don't think we can land tests for them unless we have a way of expecting test failures, which I don't think I have the cycles for. Thanks for the review! @bors-servo r=fitzgen |
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📌 Commit c09c74e has been approved by |
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☀️ Test successful - status-travis |
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This is the first step to fix #1370 / #1338 / etc.
Fix for that will build up on this.